Procedure for modifying an actuator comprising a linear form memory element to detect a movement of the actuator in a manufacturing item in which it is to be used, including the procedure that:a sensitive coating is formed in a pattern of coating segments in a selected surface area of the linear form memory element, the coating being of a composition formed in such a way on the surface of the form memory element, the creation of a detectable sequence of signals reflecting the movement of the actuator in the manufacturing object, characterized by the sensitive coating of spatially variable thickness or composition to provide a signal of varying intensity;which reflects the movement of the actuator in the manufacturing item.
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